Описание
The iW1602 is a high performance AC/DC power supply controller that uses digital control technology to build peak current mode PWM flyback power supplies. The device operates in quasi-resonant mode to provide high efficiency and includes a number of key built-in protection features while minimizing the external component count, simplifying EMI design and lowering the total bill of material cost. The iW1602 removes the need for secondary feedback circuit while achieving excellent line and load regulation. It also eliminates the need for loop compensation components while maintaining stability over all operating conditions. Pulse-by-pulse waveform analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load response. The built-in power limit function enables optimized transformer design in universal off-line applications and allows for a wide input voltage range.Dialog’s innovative proprietary technology ensures that power supplies built with the iW1602 can achieve both the highest average active efficiency and low no-load power consumption, and have fast dynamic load response in a compact form factor in typical 5V, 2A, 10W applications. The iW1602 has unique user-configurable light-load operation modes to allow optimization of the system cost and performance according to the application requirements of dynamic load response and no-load power consumption.
- User-configurable light-load operation modes for optimized dynamic load response and no-load power consumption
- No-load power consumption < 30mW at 230VAC with fast dynamic load response in typical 5V, 2A 10W compact adapter/charger when iW600 is used as the secondary IC
- No-load power consumption < 75mW at 230VAC along with fast dynamic load response in typical 5V, 2A 10W compact adapter/charger applications without iW600
- Tight constant-voltage and constant current regulation across line and load range
- Primary-side feedback eliminates opto-isolators and simplifies design
- Intelligent low power management achieves ultra-low operating current (~250µA) at no-load
- Proprietary optimized 89kHz maximum PWM switching frequency with quasi-resonant operation achieves best size, efficiency and common mode noise
- User-configurable 5-level cable drop compensation provides design flexibility
- EZ-EMI® design enhances manufacturability
- Adaptive multi-mode PWM/PFM control improves efficiency
- Complies with CoC Version 5 Tier 2 and DOE level VI energy-efficiency specifications with ample margin
- Built-in single-point fault protections against output short-circuit, output over-voltage and output overcurrent
- Dedicated pins for external over-voltage protection, with latch function available
- SmartDefender™ smart hiccup technology helps to address issues of soft shorts in cables and connectors by effectively reducing the average output power at fault conditions without latch
- Optional on-chip internal over-temperature protection
- No audible noise over entire operating range
- Space-saving SOT-23 package
